Abstract:

Tangshan gold mine is the only independent, miniature fine disseminated gold deposit found in Jiangsu Province. Followed by 1∶〖KG-*2〗200000, 1∶〖KG-*2〗50000 database of natural placer mineral survey in Tangshan gold district, and combined with the assemblage characteristics of minerals in deposit, we chose limonite, pyrite, arsenic minerals (like realgar, orpiment and arsenopyrite), cinnabar, native silver, lead minerals (including natural lead, galena and cerussite), sphalerite, native gold, copper minerals (such as chalcopyrite, bornite, azurite and malachite), barite and so on as the major typomorphic minerals. Through ZSAPS2.0 software and GIS platform, this paper finally delineates natural placer mineral combinaton anomalies, and finds out that pyrite and limonite are the direct indicative minerals, and native gold, sphalerite, cinnabar, arsenopyrite, barite are the secondary indicative minerals of Tangshan gold mine. Considering prospecting signs, we establish Tangshan gold mine geologicalnatural placer prospecting criteria, which provides some reference for indepth evaluation of Tangshan gold prospecting potential.

Key words: Tangshan gold mine, finedisseminated type, natural placer mineral, indicative mineral, prospecting criteria

摘要：

汤山金矿是江苏省发现的唯一一个小型微细浸染型独立金矿床。基于汤山金矿区1∶〖KG-*2〗20万、1∶〖KG-*2〗5万自然重砂建库数据，结合矿床矿石矿物组合特征，选择褐铁矿、黄铁矿、砷矿物（雄黄、雌黄、毒砂）、辰砂、自然银、铅矿物（自然铅、方铅矿、白铅矿）、闪锌矿、自然金、铜矿物（黄铜矿、斑铜矿、蓝铜矿、孔雀石）、重晶石等作为主要标型矿物，通过ZSAPS20软件，应用GIS平台，圈定自然重砂组合异常。通过异常特征剖析发现，黄铁矿和褐铁矿为汤山金矿直接指示矿物，自然金、闪锌矿、辰砂、毒砂、重晶石为汤山金矿次一级指示矿物。在此基础上，结合地质找矿标志，建立汤山金矿地质—自然重砂找矿标志，为深入评价汤山金矿找矿潜力提供自然重砂方面的依据。

关键词: 汤山金矿, 微细浸染型, 自然重砂, 指示矿物, 找矿标志